JPWO2019021627A1 - Power supply monitoring data processing device, power supply monitoring data processing method, and power supply monitoring data processing program - Google Patents

Abstract

The data acquisition unit includes a switching unit that selectively outputs AC power supplied from a system power supply or an internal combustion power generator, and an AC/DC converter that converts the AC power output from the switching unit into DC power and outputs the DC power. A first data including the output voltage and/or the output current of the switching unit, and the output voltage and/or the output current of the power supply system as the monitoring data of the power supply system including the power storage device connected to the DC bus. Acquire the second data. The data processing unit estimates the operating state of the internal combustion power generation device based on the first data and the second data, and shortens the operating time of the internal combustion power generation device. Generate a value change plan.

Description

  The present invention relates to a power supply monitoring data processing device that processes monitoring data of a power supply system including a backup power storage device, a power supply monitoring data processing method, and a power supply monitoring data processing program.

  In emerging countries such as India, Southeast Asia, South America, and Africa, power supply conditions are worse than in advanced countries such as Japan and Europe, and power outages frequently occur. In emerging countries, there are many planned blackouts as well as sudden blackouts. Therefore, as a general rule, a backup power supply system is installed alongside infrastructure equipment such as mobile phone base stations in case of a power outage. In emerging countries, stable facility management of communication facilities and securing of power sources are the major keys to the quality of communication services.

  A hybrid system in which a power generator and a storage battery are combined is often used as a backup power supply system. Although it is possible to use a solar power generator or a wind power generator as the power generator, it is possible to use an internal combustion power generator (for example, a diesel generator or a gas turbine generator) that can generate power regardless of the weather. Many (for example, refer to Patent Documents 1 and 2). Fossil fuels are required when using internal combustion power generators.

Japanese Patent Laid-Open No. 2004-062254 JP, 2016-039648, A

  When the system power supply fails, the storage battery and the internal combustion power generator of the backup power supply system supply the backup power to the load. At that time, if the power supply is not managed according to the stability of the system power supply, the operating time of the internal combustion power generator becomes longer than expected and the fuel is excessively consumed. In addition, many backup power supply systems in emerging countries cannot confirm the current settings and environment, and it is often difficult to confirm the amount of fuel consumption.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for continuously performing efficient operation of a power supply system that uses both a power storage device and an internal combustion power generation device.

  In order to solve the above problems, a power supply monitoring data processing device according to an aspect of the present invention includes a switching unit that selectively outputs AC power supplied from a system power supply or an internal combustion power generation device, and a switching unit that outputs the AC power. As a monitoring data of a power supply system, an AC/DC converter that converts AC power into DC power and outputs the DC power to a DC load, and a power storage device connected to a DC bus between the AC/DC converter and the DC load A data acquisition unit for acquiring first data including the output voltage and/or output current of the switching unit and second data including the output voltage and/or output current of the power supply system; and a data acquisition unit acquired by the data acquisition unit. A system configuration and/or discharge of the power storage device for estimating the operating condition of the internal combustion power generation device based on the first data and the second data and shortening the operating time of the internal combustion power generation device A data processing unit for generating a lower limit change plan.

  It should be noted that any combination of the above constituent elements and one obtained by converting the expression of the present invention among methods, devices, systems, etc. are also effective as an aspect of the present invention.

  According to the present invention, an efficient operation of a power supply system that uses both a power storage device and an internal combustion power generation device can be continuously performed.

It is a block diagram which shows the whole structure of a communication facility, a central monitoring system, and a power supply monitoring data processing apparatus. It is a figure which shows the structural example of the power supply system of a communication facility. It is a figure which shows the transition example of the power supply state of a certain power supply system. It is a figure which shows the structural example of the power supply monitoring data processing apparatus which concerns on embodiment of this invention. 6 is a flowchart showing an operation example of the power supply monitoring data processing device according to the embodiment of the present invention. It is a figure which shows an example of a format of a fuel reduction performance evaluation report. FIGS. 7A and 7B are diagrams showing modified examples of the graph area showing the operation results and the pre-improvement estimation operation of FIG.

  FIG. 1 is a block diagram showing an overall configuration of a communication facility 1, a central monitoring system 2, and a power supply monitoring data processing device 3. Each communication facility 1 includes a power supply system 10. In the following description, it is assumed that the communication facility 1 is a mobile phone base station device. The mobile station base station device is installed in many places, and the communication quality is improved. In a country with a large land area, base station devices of 100,000 sites or more may be installed.

  The central monitoring system 2 is a system for remotely monitoring the power supply systems 10 of the plurality of communication facilities 1, and is constructed by, for example, a plurality of servers. The central monitoring system 2 is connected to the power supply system 10 of each communication facility 1 via a network, and collects monitoring data from each power supply system 10. The network may use the Internet or a private line.

  The power supply monitoring data processing device 3 is a device that processes the monitoring data of the plurality of power supply systems 10 collected by the central monitoring system 2. The power supply monitoring data processing device 3 is composed of, for example, an information processing device such as a server, a PC, a tablet, or a smartphone. The power supply monitoring data processing device 3 acquires the monitoring data of the plurality of power supply systems 10 from the central monitoring system 2 via the network. The monitoring data of the plurality of power supply systems 10 may be acquired via the recording medium. In FIG. 1, the power supply monitoring data processing device 3 and the central monitoring system 2 are illustrated as separate components, but the power monitoring data processing device 3 may be integrated into the central monitoring system 2. Although a plurality of power supply systems 10 are connected to the central monitoring system 2 (star type) in FIG. 1, a hierarchical structure (tree type) or communication depending on the geographical situation is used. Different connection configurations such as multiplexing (loop type) with an emphasis on stability and configurations having a combination thereof may be used.

  FIG. 2 is a diagram illustrating a configuration example of the power supply system 10 of the communication facility 1. The power supply system 10 shown in FIG. 2 has three power sources, namely, a system power supply 5, a diesel power generator 11, and a power storage device 12. The diesel power generator 11 is a device that mainly uses light oil as a fuel to generate power by a compression ignition method, and outputs AC power. A gas turbine power generator may be used instead of the diesel power generator 11. In that case, the fuel is mainly natural gas. Although other power supply equipment such as a solar power generation system may be connected, it is not shown in the present embodiment.

  The switching unit 13 selectively outputs the AC power supplied from the system power supply 5 and the AC power supplied from the diesel power generator 11. The AC/DC converter 14 converts the AC power supplied via the switching unit 13 into DC power having a predetermined voltage (hereinafter, referred to as reference voltage) and outputs the DC power to the DC bus 15. The DC bus 15 is connected to the DC load 1L of the communication facility 1. The DC bus 15 can be constructed by, for example, a bus bar.

  The power storage device 12 is connected to the DC bus 15, and the power storage device 12 can charge and discharge the DC bus 15. Charging/discharging is often controlled based on the state of the DC bus 15 (voltage value, current value, etc.).

  The power storage device 12 includes a plurality of power storage modules m1 to mn connected in parallel, a battery management unit 121, and a switch 122. Each power storage module m1 to mn includes a plurality of cells connected in series. As the cell, a lithium ion battery cell, a nickel hydrogen battery cell, a lead battery cell, an electric double layer capacitor cell, a lithium ion capacitor cell, or the like can be used. Hereinafter, in the present specification, an example using a lithium ion battery cell (nominal voltage: 3.6 to 3.7 V) is assumed. The plurality of power storage modules m1 to mn connected in parallel are connected to the DC bus 15 via the switch 122. For the switch 122, for example, a relay can be used.

  The battery management unit 121 monitors the states of the plurality of power storage modules m1 to mn. Specifically, the voltage, current, and temperature of each cell included in the plurality of power storage modules m1 to mn are monitored. The battery management unit 121 executes SOC (State Of Charge) management, SOH (State Of Health) management, equalization control, battery protection, and the like.

  SOC can be estimated by a current integration method or an OCV (Open Circuit Voltage) method. SOH is defined by the ratio of the current full charge capacity to the initial full charge capacity, and the lower the value (the closer to 0%), the more the deterioration is progressing. SOH can be estimated based on the correlation with the internal resistance. The internal resistance can be estimated by dividing the voltage drop generated when a predetermined current is passed through the battery for a predetermined time by the current. The internal resistance has a relationship of decreasing as the temperature rises, and has a relationship of increasing as the deterioration of the battery progresses.

  The equalization control is control for equalizing the voltages or capacities of a plurality of cells connected in series. The battery protection is control for electrically disconnecting the plurality of power storage modules m1 to mn from the DC bus 15 by turning off the switch 122 when detecting an overvoltage, an undervoltage, an overcurrent, or a temperature abnormality.

  The control unit 16 monitors and manages the entire power supply system 10. The control unit 16 uses, as basic monitoring data of the power supply system 10, a voltage value and/or a current value (hereinafter, referred to as first data) at a first point (N1) and a voltage value and a second point (N2). And/or a current value (hereinafter referred to as second data) is detected. The first data is a three-phase/single-phase AC voltage value and/or AC current value output from the switching unit 13. The second data is a DC voltage value and/or a DC current value output from AC/DC converter 14 and/or power storage device 12. When measuring the current value, it is necessary to measure the current value on the DC bus 15 on the DC load 1L side or the power storage device 12 side from the confluence point (Nb) of the power storage device 12.

  The control unit 16 transmits the measured first data and second data as monitoring data of the power supply system 10 to the central monitoring system 2 via the network at regular intervals (for example, once every 10 minutes).

  When a power failure of the system power supply 5 occurs, the connection destination of the switching unit 13 is switched from the system power supply 5 to the diesel power generator 11. This switching may be performed by hardware or may be performed by software control with the control unit 16 interposed. After the power failure occurs, the diesel power generator 11 waits until there is a start instruction from the control unit 16. The battery management unit 121 turns on the switch 122. The battery management unit 121 recognizes the occurrence of a power failure by receiving a power failure detection signal from the power failure detection sensor or the control unit 16.

  The discharge start voltage of the power storage modules m1 to mn is set to a voltage lower than the reference voltage of the DC bus 15 by a predetermined value. When the switch 122 is in the ON state, when the voltage of the DC bus 15 becomes lower than the voltage of the power storage modules m1 to mn, discharging from the power storage device 12 to the DC bus 15 starts. After the start of discharging, when the remaining capacity of the power storage modules m1 to mn reaches the lower limit value, the battery management unit 121 sends a discharge end notification to the control unit 16. The lower limit value of the remaining capacity is a value set to suppress over-discharge and protect the battery, and may be specified by voltage or SOC. The storage battery has a property that the life is shortened as the depth of discharge (DOD) is deeply used.

  When the control unit 16 receives the discharge end notification from the battery management unit 121, the control unit 16 transmits an operation command to the diesel power generator 11. The battery management unit 121 may directly transmit the operation command to the diesel power generator 11. Further, the diesel power generator 11 may have an operation determination function and may be configured to manage the operation status in cooperation with each other. When the diesel power generator 11 receives the operation command and starts power generation, the voltage of the DC bus 15 starts rising. When the voltage of DC bus 15 becomes higher than the voltage of power storage modules m1 to mn, charging of power storage device 12 from DC bus 15 starts. After the start of charging, when the remaining capacity of the power storage modules m1 to mn reaches the upper limit value, the battery management unit 121 transmits a charging end notification to the control unit 16. The upper limit value of the remaining capacity is a value that is set in order to suppress overcharge and protect the battery, and may be specified by voltage or SOC.

  When the control unit 16 receives the charging end notification from the battery management unit 121, the control unit 16 sends a stop command to the diesel power generator 11. The battery management unit 121 may directly send the stop command to the diesel generator 11. Further, the diesel power generator 11 may have an operation determination function and may be configured to manage the operation status in cooperation with each other. When the diesel power generator 11 receives the stop command and stops power generation, the voltage of the DC bus 15 starts to decrease. When the voltage of DC bus 15 becomes lower than the voltage of power storage modules m1 to mn, discharging from power storage device 12 is restarted. The above control is repeated until the system power supply 5 is restored.

  In this way, when the system power supply 5 fails, the power supply system 10 uses the power storage device 12 and the diesel generator 11 to supply backup power to the DC load 1L until the system power supply 5 is restored. As a basic operation at the time of backup, the power storage device 12 is charged in advance, and power is supplied from the power storage device 12 triggered by a power failure detection. When the power supplied to the power storage device 12 decreases, the diesel power generation device 11 starts.

  FIG. 3 is a diagram showing a transition example of the power supply state of a certain power supply system 10. When a power failure of the system power supply 5 occurs, the power supply for supplying power to the DC load 1L is changed from the system power supply 5 (denoted as EB in FIG. 3) to the power storage device 12 (denoted as Lib in FIG. 3). change. When the power outage period is long (see the power outage period A), the power supply that supplies power to the DC load 1L alternately switches between the power storage device 12 and the diesel power generation device 11 (denoted as DG in FIG. 3 ). When the power failure period is short (refer to the power failure period B), only the power storage device 12 is used as a power source for supplying power to the DC load 1L.

  In the power supply system 10, if the power supply management according to the stability of the system power supply 5 is not performed, the operation of the diesel power generator 11 will be performed for a longer period than expected, and the fuel of the diesel power generator 11 will be excessively consumed. . When the fuel of the diesel power generator 11 is used up, the communication facility 1 as a whole goes down. Further, if the operation time of the diesel power generator 11 becomes long, not only the cost of the fuel itself but also the human cost increases. Refueling and transportation must be done manually by engineers, resulting in an increase in labor costs.

  The behaviors of all the devices of the power supply system 10 installed at the site where the communication facility 1 is provided are not measured. For example, when the diesel power generator 11 has a mechanism of automatically starting and stopping according to the power supply state of the site, there is no data about when the diesel generator 11 was started and stopped. For example, when only the electrical system data of the AC mains and the DC bus 15 are measured, it cannot be distinguished whether the AC mains data is output from the system power supply 5 or the diesel power generator 11. .

  Further, when the number of sites is enormous, it is difficult to unify the specifications of the power supply system 10 at all sites, and it is also difficult to unify the models of the diesel power generator 11 and the power storage device 12 to be used. Further, in the installation work of the power supply system 10, it is often the case that a worker has not been able to completely install and set the equipment in consideration of the difference in the equipment and the installation environment.

  In many power supply systems 10 in emerging countries, it is difficult to confirm the amount of fuel consumption because the current settings and environment cannot be confirmed from the outside. In addition, power outages occur frequently and the power supply infrastructure is complicated. There are cases in which sufficient reliable coordination is not achieved in the power system. Also, the pattern of power outage varies from site to site. The power outage time for each month is different, and there are often no accurate data on the power outage time. In emerging countries, theft of materials and fuel is more frequent than in developed countries.

  Under the above circumstances, efforts are being made to reduce fuel costs, but the results of these efforts cannot be confirmed, and the motivation for continuing activities is low. Hereinafter, a mechanism for efficiently and continuously making efforts to reduce the fuel cost by using the power supply monitoring data processing device 3 will be described.

  FIG. 4 is a diagram showing a configuration example of the power supply monitoring data processing device 3 according to the embodiment of the present invention. The power supply monitoring data processing device 3 includes a calculation unit 31, a communication unit 32, a storage unit 33, and a UI unit 34. The calculation unit 31 includes a data acquisition unit 311, a data processing unit 312, and a report creation unit 313.

  The configuration of the arithmetic unit 31 can be realized by cooperation of hardware resources and software resources. CPU, ROM, RAM, and other LSIs can be used as hardware resources. Programs such as operating system and applications can be used as software resources. The communication unit 32 executes communication processing according to a predetermined communication protocol. The communication unit 32 can be realized by cooperation of hardware resources and software resources, or by hardware resources alone. The storage unit 33 includes a non-volatile memory such as HDD and SDD. The UI unit 34 includes input devices such as a keyboard, a mouse, a microphone, and a touch panel, and output devices such as a display, a speaker, and a printer.

  FIG. 5 is a flowchart showing an operation example of the power supply monitoring data processing device 3 according to the embodiment of the present invention. In this operation example, it is premised that direct data indicating the operating states of the system power supply 5 and the diesel power generator 11 cannot be obtained. That is, it is assumed that accurate data cannot be obtained for the period during which the system power supply 5 is normal, the period during which the power is out, and the period during which the diesel power generator 11 is generating power and during which it is stopped.

  The data acquisition unit 311 acquires the first data and the second data as the monitoring data (actual data) of the target power supply system 10 (S10). It is desirable to continuously collect this monitoring data for a certain period. The data processing unit 312 applies the first data and the second data to a predetermined evaluation model to estimate the operating states of the system power supply 5 and the diesel power generator 11 (S11). The evaluation model can be constructed based on the behavior of the first data and the second data of the multiple power supply systems 10. As a general tendency, the alternating-current waveform of the system power supply 5 and the alternating-current waveform of the diesel power generator 11 change with different degrees of stability. That is, the data processing unit 312 can estimate the operating status of the diesel power generator 11 based on the difference in the changes in the AC waveforms such as the stability of the first data and the second data and the transition of the stability.

  The data processing unit 312 can also estimate the operating status of the power storage device 12 based on the first data and the second data. When the first data is substantially zero and the second data is in the normal range as the output voltage/current to DC load 1L, power storage device 12 is estimated to be in the discharged state. On the other hand, when the first data is in the normal range as the output voltage/current to DC load 1L, power storage device 12 is estimated to be in the stopped/charged state.

  The data processing unit 312 generates a change plan for the power storage device 12 based on the stability of the system power supply 5, the operation status of the diesel power generator 11, and the operation status of the power storage device 12 in the target power supply system 10 (S12). ). The change plan of the power storage device 12 is a change plan for shortening the operating time of the diesel power generator 11, and is generated by inputting the above parameters to a predetermined change plan generation model. The change plan generation model can be constructed based on the knowledge of the engineer and/or the learning data of the change records of the large number of power supply systems 10.

  The change plan generation model illustrated below includes a change in the system configuration of the power storage device 12 and/or a change in the set value. Specifically, the number of power storage modules and the discharge lower limit value of the power storage modules are used as change items. In order to shorten the operating time of the diesel power generator 11, it is necessary to lengthen the discharging time of the power storage device 12. As a method for this, increasing the storage capacity and increasing the depth of discharge can be mentioned.

  The storage capacity can be increased by increasing the number of parallel storage modules. The discharge depth can be deepened by lowering the discharge lower limit value. The discharge lower limit value is often set to the recommended value described in the specification of the battery manufacturer when the power storage device 12 is installed. Therefore, depending on the usage environment of the power storage device 12 (for example, ambient temperature), it may be possible to safely use a deeper region. The discharge lower limit value is preferably changed by the battery management unit 121 in consideration of the deterioration of the battery regardless of whether or not there is a change plan.

  The data processing unit 312 calculates a predicted value of the operation suppression amount of the diesel power generator 11 when the above change plan is implemented, based on the past operation status data of the system power supply 5 in the target power supply system 10 ( S13). The operation suppression amount can be calculated by at least one of the suppression time, the fuel reduction amount, and the fuel reduction cost. When calculating with fuel reduction costs, it is desirable to calculate with net reduction costs. That is, the amount obtained by subtracting the increase cost (for example, the expansion cost of the power storage module) associated with the implementation of the change plan of the power storage device 12 from the fuel reduction cost of the diesel power generator 11 is used.

  The data processing unit 312 compares the predicted value of the calculated operation suppression amount with a predetermined threshold value (S14). The predetermined threshold value may be defined for each number of power storage modules to be added. When the predicted value of the operation suppression amount is smaller than the predetermined threshold value (N of S14), the proposal and implementation of the change plan are suspended (step S21). When the predicted value of the operation suppression amount is equal to or larger than the predetermined threshold value (Y in S14), the manager of the power supply system 10 is proposed and notified of the change plan. The proposal/notification of the change plan may be transmitted from the communication unit 32 to the terminal device of the manager via the network, or may be performed face-to-face by the service person.

  The case where the predicted value of the operation suppression amount is smaller than the predetermined threshold value means that the improvement effect of fuel reduction predicted by the implementation of the change plan is small. The degree of effect improvement mainly depends on the power failure pattern of the system power supply 5 in the power supply system 10 and the environmental condition of the place where the power supply system 10 is installed. Even if the power storage module is added, the operation suppression amount of the diesel power generator 11 may be small depending on the power failure pattern of the system power supply 5. Even if the effect improvement is predicted to be small, if the power outage pattern or the environmental condition of the system power supply 5 changes over time, the effect improvement due to the change in the system configuration and/or the setting of the power storage device 12 may increase.

  When the change plan is implemented (Y of S15), the data acquisition unit 311 acquires the first data and the second data as the monitoring data of the power supply system 10 after the implementation of the change plan (S16). Whether or not the system configuration and/or setting of the power storage device 12 is actually changed according to the change plan can be detected by monitoring a detection value of a sensor (not shown) installed in the power storage device 12. Further, the change completion notification input by the operator to the terminal device may be detected by receiving it via the network.

  The data processing unit 312 applies the first data and the second data after the implementation of the change plan to the evaluation model to estimate the operating status (actual data) of the system power supply 5 and the diesel power generator 11 (S17). The data processing unit 312 estimates the operating status (assumed data) of the diesel power generator 11 when the change plan is not implemented, based on the estimated operating status (actual data) of the system power supply 5 (S18). ..

  The data processing unit 312 compares the operation status (actual data) of the diesel power generation apparatus 11 after the execution of the change plan with the operation status (assumed data) of the diesel power generation apparatus 11 when the change plan is not executed. The operation suppression amount of the diesel power generation device 11 due to the implementation of the change plan is estimated (S19). For example, the operation suppression amount is estimated by calculating the difference between the operating times of the two diesel power generators 11. The report creation unit 313 creates a fuel reduction performance evaluation report including the estimated operation suppression amount of the diesel power generator 11 (S20). The created report is transmitted from the communication unit 32 to the terminal device of the administrator of the power supply system 10 via the network. Or printed on a printer and mailed or handed.

  The above steps S10 to S20 are executed periodically (for example, once a month) for each power supply system 10 or as needed. For example, when the improvement work of the system power supply 5 is being performed, it is executed when the improvement work is completed. The power supply system 10 for which the change plan has been implemented becomes the changed site, and the power supply monitoring data processing device 3 holds the changed system configuration and/or settings and continues data collection.

  After the change plan is proposed and notified to the administrator in step S15, while the change plan is not implemented (N in S15), the power supply system 10 becomes a holding site (step S21). For the power supply system 10 that is the reservation site (S21), when a predetermined period (for example, 3 months) has elapsed (Y of S22), the process proceeds to step S10 and the change plan of the power storage device 12 is regenerated (S10-). S13). The hold site is set to have a longer interval period until the change plan is regenerated than the changed site. The pending site is a site with low expectation of effect improvement, or a site with a low awareness of the effect improvement of the administrator. By lowering the frequency of generating the change plan of the hold site, it is possible to reduce the processing load for generating the change plan.

  As described above, according to the present embodiment, in the power supply system 10 that uses both the diesel power generator 11 and the power storage device 12, the power backup setting that suppresses the fuel consumption of the diesel power generator 11 is efficiently and continuously realized. it can. Specifically, the power supply monitoring data processing device 3 collects data of the power supply system 10 before/after implementation of the change plan, and estimates the operating states of the diesel power generation device 11, the power storage device 12, and the system power supply 5. The power supply monitoring data processing device 3 creates a change plan based on the estimated value and creates a fuel reduction performance evaluation report by implementing the change plan.

  Not only the initial system configuration and design items are determined, but also efficient operation related to the equipment of the power supply system 10 can be continuously realized. Further, the system configuration and/or the setting of power storage device 12 can be changed in consideration of the change in stability of system power supply 5 over a long period of time. Further, the effect confirmation after the change of the system configuration and/or the setting can be performed in parallel, and the effect of the change can be appropriately evaluated.

  Through the above site management, efficient operation of the power supply system 10 can be continuously realized, and by linking the operation data and the performance evaluation, the results of the service regarding the improvement proposal for fuel reduction Can be confirmed quantitatively. In the case of a power supply system that uses both a solar power generation system and a power storage device, even if the system configuration and/or settings of the power storage device are changed, the power generation cost (fossil fuel cost) does not fluctuate, so the above service is not necessary. ..

  The present invention has been described above based on the embodiment. It is understood by those skilled in the art that the embodiments are exemplifications, that various modifications can be made to the combinations of the respective constituent elements and the respective processing processes, and that the modifications are within the scope of the present invention. .

  In the above-described embodiment, it is assumed that accurate operation data of the system power supply 5 and the diesel power generator 11 cannot be obtained. In this respect, in the case of a site where accurate operation data of the grid power supply 5 and/or the diesel power generator 11 can be obtained, it is not necessary to estimate the operation status of the grid power supply 5 and/or the diesel power generator 11, and the measured operation data Can be used as is. Further, in the case of a site where the operation data and the state data of the power storage device 12 can be acquired, it is possible to more precisely generate a plan for changing the system configuration and/or settings in consideration of the degree of deterioration of the power storage device 12 and the environmental conditions. it can.

  When generating the change plan in step S12 of the flowchart of FIG. 5, the overall cost reduction effect may be calculated in consideration of the long-term life of the storage battery. At that time, the life prediction of the storage capacity based on the operation data of the storage battery may be taken into consideration. Further, as the determination auxiliary information that can be used when the change plan is generated, data may be externally input to the power supply monitoring data processing device 3. Further, the configuration may be such that the aggregated value or estimated value of the data serving as the basis for generating the change plan can be output to the outside as auxiliary information. By providing such an input/output interface, it is possible to intervene the judgment of a person such as an engineer in charge, and it is possible to generate a more precise change plan. In addition, it is possible to make corrections based on the empirical rules of skilled engineers.

  The data processing unit 312 continuously collects the collected performance data of the power supply system 10 to generate statistical data. The statistical data can be utilized for detecting an abnormality sign of the entire power supply system 10 or individual equipment. Further, based on the detection result, the system configuration and/or setting of power storage device 12 may be corrected to a system configuration and/or setting according to an aged state or the like.

  Further, a DC/DC converter may be connected between the DC bus 15 and the power storage modules m1 to mn, in addition to the switch 122 or instead of the switch 122. In this configuration, the battery management unit 121 can actively control the charging current/voltage and the discharging current/voltage, and the battery management unit 121 can adjust the charging pattern/discharge pattern. In this case, the charge pattern/discharge pattern can be changed in the item of setting change of the power storage device 12.

  In addition, in the above-described embodiment, the report creating unit 313 is configured to create the fuel reduction performance evaluation report including the estimated operation suppression amount of the diesel power generator 11. A specific example of the fuel reduction performance evaluation report is given below.

  FIG. 6 is a diagram showing an example of the format of the fuel reduction performance evaluation report. In the performance evaluation report 35 shown in FIG. 6, the reduction amount (hour) 36 of the operating time of the diesel power generation device 11 is described as the value of the fuel reduction performance in the corresponding period. In addition, as the value of the fuel reduction result for the corresponding period, the operation efficiency of the diesel power generation device 11, the operating time, and the fuel reduction amount (amount of money) calculated from the fuel unit price for the corresponding period may be described. Note that only the fuel reduction amount (money amount) may be described.

  The performance evaluation report 35 shown in FIG. 6 describes the transition performance of the operating state of the diesel power generator 11 during the relevant period. FIG. 6 shows an example in which the transition record of the operating state is represented by a transition graph. If the transition graph does not include all the relevant periods, some of the periods may be excerpted.

  The transition graph corresponds to a graph in which the supply timing (period) from the DG in FIG. 3 is drawn with actual data. Since it is premised on an environment in which accurate detection information of EB/Lib/DG cannot be acquired, the transition graph is drawn based on an estimated amount based on actual data. The estimated amount here is different from the "operating status (assumed data) of the diesel power generator 11 when the change plan is not implemented", and the operating state transition performance is estimated from actual performance data. It is a thing.

  In the graph, in addition to the power supply timing from DG, the power supply timing from EB and/or Lib may be drawn together. In that case, the format is the same as that of the power state transition graph of FIG. Also, the blackout period estimated from the actual data may be drawn together. An arrow indicating a power failure period is added to the power state transition graph of FIG.

  In addition, an operation status (assumed data) of the diesel power generator 11 when the change plan is not implemented may be described together with a transition graph. The power supply state transition graph of FIG. 3 corresponds to the format written above and below before and after implementation. This makes it possible to see at a glance how the operation of the DG is improving. The transition graph when the change plan is not implemented may include not only the power supply timing from the DG but also the power supply timing from the EB and/or the Lib. Also, an arrow indicating the power failure period may be added together.

  Although not essential, the current setting information and/or the setting information indicating the case where the change plan is not implemented (past setting information) may be described as the reference information. It is rare for a site administrator to remember all the current and/or past setting statuses of multiple sites, and it is helpful to enter the current and/or past setting information.

  FIGS. 7A and 7B are diagrams showing modified examples of the graph area 37 showing the operation results and the pre-improvement estimation operation of FIG. The graph area 37a shown in FIG. 7A is obtained by adding an arrow 38 indicating a power failure period to the graph area 37 of FIG. The graph area 37b shown in FIG. 7B is a format example in which the arrow 38 indicating the power failure period is added and the power supply timing from the EB and/or the Lib is also described.

  The embodiment may be specified by the following items.

[Item 1]
A switching unit (13) that selectively outputs AC power supplied from the system power supply (5) or the internal combustion power generator (11), and converts the AC power output from the switching unit (13) into DC power. And an AC/DC converter (14) for outputting to a DC load (1L), and a power storage device (12) connected to a DC bus (15) between the AC/DC converter (14) and the DC load (1L). Monitoring data of the power supply system (10) including the first data including the output voltage and/or the output current of the switching unit (13), and the output voltage and/or the output current of the power supply system (10). A data acquisition unit (311) for acquiring the second data,
The operating status of the internal combustion power generation device (11) is estimated based on the first data and the second data acquired by the data acquisition unit (311), and the operating time of the internal combustion power generation device (11) is estimated. A data processing unit (312) for generating a system configuration of the power storage device (12) and/or a discharge lower limit value change plan for shortening
Power supply monitoring data processing device (3).

  According to this, the power supply system (10) using both the power storage device (12) and the internal combustion power generation device (11) can be continuously operated efficiently.

"Item 2"
The data processing unit (312) estimates the operating status of the internal combustion power generation device (11) based on the amount of change in the first data and the second data.
The power supply monitoring data processing device (3) according to item 1.

  The “change amount” indicates a change amount based on a change of at least one physical quantity variable such as “stability” or “transition of stability”.

  According to this, even when the operation data of the internal combustion power generation device (11) cannot be directly obtained, the change plan of the power storage device (12) can be generated.

"Item 3"
The data acquisition unit (311) acquires the first data and the second data of the power supply system (10) after implementing a change plan of the power storage device (12),
The data processing unit (312) is
Based on the first data and the second data of the power supply system (10) after the change, the operating status of the internal combustion power generator (11) after the change and the operation of the system power supply (5) Estimate the situation,
Based on the operating status of the system power source (5), the operating status of the internal combustion power generator (11) when the change plan is not implemented is estimated, and the operating status of the internal combustion power generation device (11) when the change plan is not implemented is estimated. The operating status of the internal combustion power generator (11) is compared with the operating status of the internal combustion power generator (11) after the change plan is executed, and the internal power generator (11) according to the change plan is executed. Estimate the amount of operation suppression,
The power supply monitoring data processing device (3) according to item 1 or 2.

  According to this, it is possible to quantitatively evaluate the fuel reduction effect by the implementation of the change plan.

"Item 4"
The data processing unit (312) determines whether to suspend the regeneration of the change plan based on the operation suppression amount of the internal combustion power generation device (11),
The power supply monitoring data processing device (3) according to item 3.

  According to this, the number of generated change plans can be reduced, and the processing load can be reduced.

"Item 5"
The data processing unit (312) suspends regeneration of the change plan when the operation suppression amount is smaller than a predetermined threshold value or when the change plan has not been implemented within a predetermined period.
The power supply monitoring data processing device (3) according to item 4.

  According to this, it is possible to effectively use the resources of the power supply monitoring data processing device (3) by suspending the regeneration of the change plan of the power supply system (10) that is predicted to have a low effect improvement.

"Item 6"
Changing the system configuration of the power storage device (12) includes increasing or decreasing the power storage modules (m1 to mn) that configure the power storage device (12),
The data processing unit (312) is based on an increase cost associated with the implementation of the change plan of the power storage device (12) and a fossil fuel reduction cost associated with the reduction of the operating time of the internal combustion power generation device (11). , Generate the change plan,
The power supply monitoring data processing device (3) according to any one of Items 1 to 5.

  According to this, it is possible to calculate the net cost performance by implementing the change plan.

"Item 7"
The data processing unit (312) includes the power supply system (10) based on the first data and the second data of the power supply system (10) after implementing a change plan of the power storage device (12). Anomaly detection of
The power supply monitoring data processing device (3) according to any one of Items 1 to 6.

  According to this, the collected data can be effectively utilized in addition to fuel reduction.

"Item 8"
A switching unit (13) that selectively outputs AC power supplied from the system power supply (5) or the internal combustion power generator (11), and converts the AC power output from the switching unit (13) into DC power. And an AC/DC converter (14) for outputting to a DC load (1L), and a power storage device (12) connected to a DC bus (15) between the AC/DC converter (14) and the DC load (1L). Monitoring data of the power supply system (10) including the first data including the output voltage and/or the output current of the switching unit (13), and the output voltage and/or the output current of the power supply system (10). Obtaining the second data,
The power storage device (12) for estimating the operating state of the internal combustion power generation device (11) based on the first data and the second data and shortening the operating time of the internal combustion power generation device (11). ), and generating a change plan of the system configuration and/or the discharge lower limit value.
Power monitoring data processing method.

  According to this, the power supply system (10) using both the power storage device (12) and the internal combustion power generation device (11) can be continuously operated efficiently.

"Item 9"
A switching unit (13) that selectively outputs AC power supplied from the system power supply (5) or the internal combustion power generator (11), and converts the AC power output from the switching unit (13) into DC power. And an AC/DC converter (14) for outputting to a DC load (1L), and a power storage device (12) connected to a DC bus (15) between the AC/DC converter (14) and the DC load (1L). Monitoring data of the power supply system (10) including the first data including the output voltage and/or the output current of the switching unit (13), and the output voltage and/or the output current of the power supply system (10). A function to acquire the second data,
The power storage device (12) for estimating the operating state of the internal combustion power generation device (11) based on the first data and the second data and shortening the operating time of the internal combustion power generation device (11). ) The system configuration and/or the function of generating a change lower limit value change plan, and causing the computer to execute:
Power supply monitoring data processing program.

  According to this, the power supply system (10) using both the power storage device (12) and the internal combustion power generation device (11) can be continuously operated efficiently. Further, it may be a non-transitory computer readable medium in which the computer program is written.

1 communication facility,
1L DC load,
2 Central monitoring system,
3 Power supply monitoring data processing device,
31 arithmetic unit,
311 Data acquisition unit,
312 data processing unit,
313 Report Creation Department,
32 Communications Department,
33 storage,
34 UI section,
5 system power supply,
10 power system,
11 diesel generator set,
12 power storage device,
m1, m2, mn power storage module,
121 Battery Management Department,
122 switch,
13 switching unit,
14 AC/DC converter,
15 DC bus,
16 Control unit.

Claims (9)

A switching unit that selectively outputs AC power supplied from a system power supply or an internal combustion power generation device; an AC/DC converter that converts the AC power output from the switching unit into DC power and outputs the DC power. First data including output voltage and/or output current of the switching unit as monitoring data of a power supply system including the AC/DC converter and a power storage device connected to a DC bus between the DC load, and the power supply A data acquisition unit for acquiring second data including the output voltage and/or output current of the system;
The power storage device for estimating the operating status of the internal combustion power generation device based on the first data and the second data acquired by the data acquisition unit and shortening the operating time of the internal combustion power generation device. And a data processing unit that generates a change plan of the system configuration and/or the discharge lower limit value,
Power supply monitoring data processing device. The data processing unit estimates an operating condition of the internal combustion power generation device based on a change amount of the first data and the second data,
The power supply monitoring data processing device according to claim 1. The data acquisition unit acquires the first data and the second data of the power supply system after implementing a change plan of the power storage device,
The data processing unit is
Based on the first data and the second data of the power supply system after the change, the operating status of the internal combustion power generator after the change and the operating status of the system power supply are estimated,
Based on the operating status of the system power source, the operating status of the internal combustion power generation device is estimated when the change plan is not implemented, and the internal combustion power generation apparatus is operated when the change plan is not implemented. By comparing the operating status of the internal combustion power generation device after carrying out the situation and the change plan, to estimate the operation suppression amount of the internal combustion power generation device by the implementation of the change plan,
The power supply monitoring data processing device according to claim 1. The data processing unit determines whether to suspend the regeneration of the change plan based on the operation suppression amount of the internal combustion power generation device,
The power supply monitoring data processing device according to claim 3. The data processing unit suspends regeneration of the change plan when the operation suppression amount is smaller than a predetermined threshold value, or when the change plan is not implemented within a predetermined period,
The power supply monitoring data processing device according to claim 4. Changing the system configuration of the power storage device includes increasing or decreasing the number of power storage modules configuring the power storage device,
The data processing unit generates the change plan based on an increased cost associated with the implementation of the change plan of the power storage device and a fossil fuel reduction cost associated with a reduction in operating time of the internal combustion power generation device,
The power supply monitoring data processing device according to claim 1. The data processing unit performs abnormality detection of the power supply system based on the first data and the second data of the power supply system after implementing a change plan of the power storage device.
The power supply monitoring data processing device according to claim 1. A switching unit that selectively outputs AC power supplied from a system power supply or an internal combustion power generation device; an AC/DC converter that converts the AC power output from the switching unit into DC power and outputs the DC power. First data including output voltage and/or output current of the switching unit as monitoring data of a power supply system including the AC/DC converter and a power storage device connected to a DC bus between the DC load, and the power supply Acquiring second data including output voltage and/or output current of the system;
A system configuration and/or a discharge lower limit of the power storage device for estimating the operating status of the internal combustion power generation device based on the first data and the second data and shortening the operating time of the internal combustion power generation device Generating a value change plan,
Power monitoring data processing method. A switching unit that selectively outputs AC power supplied from a system power supply or an internal combustion power generation device; an AC/DC converter that converts the AC power output from the switching unit into DC power and outputs the DC power. First data including output voltage and/or output current of the switching unit as monitoring data of a power supply system including the AC/DC converter and a power storage device connected to a DC bus between the DC load, and the power supply A function for acquiring second data including an output voltage and/or an output current of the system,
A system configuration and/or a discharge lower limit of the power storage device for estimating the operating status of the internal combustion power generation device based on the first data and the second data and shortening the operating time of the internal combustion power generation device The ability to generate a value change plan and have the computer execute
Power supply monitoring data processing program.

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